wide band filter

 

ZF in

GND

narrow band filter

 

 

The IF section has two IF filters, a narrow band filter and a wide band filter. One of these filters has to be replaced by a wider filter with appr. 10 kHz bandwidth. The filter ‘W’ is active if the receiver is in ‘wide’ mode, the filter ‘N’ is active if the receiver is in ‘narrow’ mode.

Date: 19-11-02

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Sony ICF-SW77 manual Gnd

ICF-SW77 specifications

The Sony ICF-SW77 is a versatile and sophisticated portable shortwave radio that caters to both amateur radio enthusiasts and casual listeners. Known for its solid performance and robust feature set, the ICF-SW77 has earned a place in the hearts of many worldwide.

One of the primary features of the ICF-SW77 is its wide frequency range, covering AM, FM, and shortwave bands. It can receive frequencies from 150 kHz to 30 MHz, making it suitable for picking up local stations as well as international broadcasts. The radio’s digital tuning system allows for precise frequency selection, ensuring that users can easily tune into their desired station without interference.

Equipped with a large LCD screen, the ICF-SW77 displays critical information, including frequency, band, and signal strength. The backlit display enhances visibility, allowing for use in low-light conditions. Furthermore, the radio features a memory function that can store multiple stations, providing convenient access to frequently listened-to channels.

The ICF-SW77 utilizes a high-sensitivity tuner, ensuring excellent reception, even in areas with weak signals. This tuner is complemented by a built-in digital signal processing technology that helps to reduce noise and enhance audio clarity. Notably, the SSB (Single SideBand) reception capabilities make it possible to listen to amateur radio transmissions, expanding the radio's functionality for serious hobbyists.

Another key characteristic of the ICF-SW77 is its dual power supply system. It can operate on both AC power or batteries, providing flexibility for outdoor use or during emergencies. The long battery life ensures extended listening sessions without interruption.

The build quality of the ICF-SW77 is robust, featuring a sturdy casing that makes it relatively durable for travel. Additionally, the ergonomic design of the device includes well-placed buttons and a comfortable grip, enhancing the user experience.

Overall, the Sony ICF-SW77 stands out for its exceptional performance, user-friendly features, and versatility. Whether you are looking to explore the world of shortwave radio or simply enjoy your favorite AM/FM stations, the ICF-SW77 delivers reliable performance and excellent sound quality, making it a noteworthy choice in the realm of portable radios.